diff --git a/extensions/matrix/src/onboarding.ts b/extensions/matrix/src/onboarding.ts
index 2ba5478a656..b99f1eb9fe5 100644
--- a/extensions/matrix/src/onboarding.ts
+++ b/extensions/matrix/src/onboarding.ts
@@ -2,6 +2,7 @@ import type { DmPolicy } from "openclaw/plugin-sdk";
 import {
   addWildcardAllowFrom,
   formatDocsLink,
+  mergeAllowFromEntries,
   promptChannelAccessConfig,
   type ChannelOnboardingAdapter,
   type ChannelOnboardingDmPolicy,
@@ -118,12 +119,7 @@ async function promptMatrixAllowFrom(params: {
       continue;
     }
 
-    const unique = [
-      ...new Set([
-        ...existingAllowFrom.map((item) => String(item).trim()).filter(Boolean),
-        ...resolvedIds,
-      ]),
-    ];
+    const unique = mergeAllowFromEntries(existingAllowFrom, resolvedIds);
     return {
       ...cfg,
       channels: {